MAX1645AEEI

Product Summary

The MAX1645AEEI is a high-efficiency battery charger capable of charging batteries of any chemistry type. It uses the Intel System Management Bus (SMBus) to control voltage and current-charge outputs. The MAX1645AEEI employs a next-generation synchro-nous buck control circuitry that lowers the minimum input-to-output voltage drop by allowing the duty cycle to exceed 99%. The MAX1645BEEI can easily charge one to four series Li+ cells. The applications of the MAX1645AEEI include Notebook Computers, Point-of-Sale Terminals and Personal Digital Assistants.

Parametrics

MAX1645AEEI absolute maximum ratings: (1)DCIN, CVS, CSSP, CSSN, LX to GND: -0.3V to +30V; (2)CSSP to CSSN, CSIP to CSIN: -0.3V to +0.3V; (3)PDS, PDL to GND: -0.3V to (VCSSP + 0.3V); (4)BST to LX: -0.3V to +6V; (5)DHI to LX: -0.3V to (VBST + 0.3V); (6)CSIP, CSIN, BATT to GND: -0.3V to +22V; (7)LDO to GND: -0.3V to (lower of 6V or VDCIN + 0.3V); (8)DLO to GND: -0.3V to (VDLOV + 0.3V); (9)REF, DAC, CCV, CCI, CCS, CLS to GND: -0.3V to (VLDO + 0.3V); (10)VDD, SCL, SDA, INT, DLOV to GND: -0.3V to +6V; (11)THM to GND: -0.3V to (VDD + 0.3V); (12)PGND to GND: -0.3V to +0.3V; (13)LDO Continuous Current: 50mA; (14)Continuous Power Dissipation: 860mW; (15)Operating Temperature Range: -40 to +85℃; (16)Storage Temperature Range: -60 to +150℃; (17)Lead Temperature (soldering, 10s): +300℃.

Features

MAX1645AEEI features: (1)Input Current Limiting; (2)175s Charge Safety Timeout; (3)128mA Wake-Up Charge; (4)Charges Any Chemistry Battery: Li+, NiCd,NiMH, Lead Acid, etc.; (5)Intel SMBus 2-Wire Serial Interface; (6)Compliant with Level 2 Smart Battery Charger Spec Rev 1.0; (7)+8V to +28V Input Voltage Range; (8)Up to 18.4V Battery Voltage; (9)11-Bit Battery Voltage Setting; (10)±0.8% Output Voltage Accuracy with Internal Reference; (11)3A (max) Battery Charge Current; (12)6-Bit Charge-Current Setting ; (13)99.99% (max) Duty Cycle for Low-Dropout Operation; (14)Load/Source Switchover Drivers; (15)>97% Efficiency.

Diagrams